Ubuntu 9.10 Beta Karmic

I have just installed Ubuntu Netbook Remix 9.10 beta on my EEEPC 100H and so far it’s been a great experience. Things that work better out of the box

• Synaptic touch pad
• LCD Fonts
• Remix user interface
• Network printing
• Performance
• Suspend/Resume
• Bluetooth device setup
• I also have reason to believe that the sound works better in Skype, but I’m still kicking the tyres on that

Improved Applications:

• GNOME Evolution now works well on the smaller screen
• Gwibber is much more useful for microblogging but it needs some work on reliability and performance
• Eclipse 3.5 now installs out of the box
• BOUML is now up to date

A few odd things that it would be nice to see fixed

• Evolution sometimes looses it Window border. Something to do with the Remix window manager I think
• Some things I had to try a second time before they settled down. E.g. 3G network management, bluetooth mouse setup (but that was probably finger trouble on my part), Skype sound

All in all a great release. I love it!

(20/Oct/09 — added comment about Gwibber reliability)

Git and Openoffice.org

N.B. These are very rough notes. See also

Sometime ago I shouted my mouth off at a local Perl Mongers meeting that using custom merge drivers it would be possible to auto merge OpenOffice document from Git, which seemed to interest some people greatly at the time.

However I then backtracked because I failed to take a few things into  account. After some more investigation it turns out it should be possible (with some wrapper scripts and OpenOffice programming) and I  *believe* the following approach stands a chance of working (I’m  hedging my bets here)

1) Create a wrapper script that opens a document, switches on change recording and saves the document, called say changeRecordingOn

2) Create another wrapper script that takes two documents (a and b), runs the OpenOffice Edit->Changes->Merge Document function and saves the result as c, called say ooAutomerge(a,b,c) (NB Base revision is  useless)

3) Create and associate a git custom merge tool for .odt and .ods files that runs ooAutomerge(). Might also need a custom merge driver?

4) Create a pre-commit hook that runs changeRecordingOn for all .odt and .ods files

When running a git-merge and then git-mergetool the OpenOffice GUI should be presented with a list of changes to accept/reject, which is much easier

NB It seems that running the OO merge and saving file c removes the previous change history. This means that if the file is merged again then the user only sees the new history since the last merge (which is what we want)

I doubt I will need this feature for some time so I don’t intend to  take it further at the moment — however if you have a need, these  notes might be useful..

I hope this makes sense? Apologies if I just swallowed two minutes of your day that could have been spend doing something better.

What tools does Alec use?

After Perl Mongers last night there was a short discussion over tools. Here is my preferred list

• Vim editor
• Git version control (and GitHub to host my remote repos)
• Linux operating system
• Perl and CPAN for programming. Not a prefect language, but has wide applicability to the the types of problems I solve
• Google search engine
• Email (gmail)
• Bash and the UNIX command line tools (sort, find, grep etc etc)
• OpenOffice
• Paper journal/notebook (currently using a Moleskine, but I prefer a Miquelrius)

Top Tip: Upgrade Git on Cygwin

The current version of git installed with Cygwin (1.5.x) has at least one annoying bug so it’s worth building  the latest version (NB I have almost all of Cygwin installed – you may need to install additional development tools and libs):

1. Download and unpack the source code. Pointer here
2. Run ‘./configure –prefix=/usr/local’
3. Run ‘make test’
4. Ignore errors relating to not detecting unwritable repos
5. run ‘make install’
6. run ‘hash -r’
7. Make sure it’s installed with ‘type git’ and ‘git –version’

Update March/09 — I found more detailed instructions

Thanks to git I’m releasing IP into the wild!

This week I at last did something I’d wanted to do for a long time and  release some of Voga‘s intellectual property to the wider world.

I have already made material available either through this blog or via Slideshare. However for a geek it’s obviously better to publish complete projects in an Open Source manner so  they can be freely copied, modified and shared.

For historical reasons this had been inconvenient to do as I used to hold everything in a single Subversion repository. Not only did this contain my potentially open material, but also my customers private data and my business records (yes, I keep my accounts database in a version control repository!). A few months I migrated my Subversion  repo to git, but I still had a single large repo and no time or skill to fix it.

However today I bit the bullet

1. Removed all my possibly public data to another directory structure
2. Tidy up my current repo by removing all the old ‘trunk’ directories — as a solo consultant I was lucky and had never had to branch my projects. Commit my new streamlined repo

Now to work on the the public projects

1. Identify a complete project and make sure it had no proprietary data. This is potentially time consuming
2. Tidy up some of the names
3. Create a new git repo; add the project files; and commit
4. Create a new repo on Github for my project
5. Follow the simple instructions to upload my project to github

To Do

• Update existing references to my projects I can find and update to point to the repo
• Add the correct license files
• Start again for as many projects as possible, please be patient

I’ll still keep presentation copies on Slideshare because that is much more convient for most people.

A big thank you to the git developers and github for making this so easy

Handy Hack: Installing Ubuntu 8.10 on EEE PC 1000H

The 10″ EEE PC 1000H makes a good choice for people looking for a notebook with a little more storage and bigger keyboard than Asus’ previous model. Unfortunately, whilst the local Harvey Norman had a good price, I was still forced to pay the Microsoft tax. So the third job after I got home (after upgrading the BIOS and checking the hardware worked ) was to install Ubuntu 8.10. The process was pretty straight forward because I had a current Ubuntu system to create the USB boot disk and a wired network connection so that I could install the wireless tweaks. However it took a fair mount of Googling to hopefully this should save some folks a bit of time.

1. Get a copy of the 32-bit Ubuntu 8.10 ISO image. I used the Desktop version, alternative should work fine as well
2. Use the Ubuntu System->Administration -> Create Startup USB tool to copy Ubuntu to a USB stick
3. Shutdown Windows on the EEE. I had to do this via Windows shutdown to get the correct prompts on power up
4. Power up the EEE with the ESC key pressed. You should be prompted for a boot device
5. Boot from USB
6. Install Ubuntu in the normal fashion
7. Connect to wired Internet connection
8. Get latest updates
9. Follow these instructions
10. You should now have a working EEE PC with wireless

To configure Evolution email use ALT-f at the end of each configuration screen (the buttons can’t be seen)

Try setting the panels to autohide this will give you a little more screen room

The EEE PC trackpad buttons are pushed from the front by the way, not the top.

How to survive the emotional pressure of working at home

When you work from home there are various things you need to do to look after yourself:

1. Identify what you need to stay sane and make sure work out how to find or do it
2. Set up networks of friends on services such as twitter or facebook. Spend a limited of time each catching up with them — but be careful not to let it affect productivity too much.
3. Make sure you get out off the ‘office’ for coffee breakfast or lunch. I like to go to a local coffee shop
4. Join various groups relevant to your professional or personal interests and consider attending group meetings. IT people based in Melbourne can find a list at Perl Net
5. Set boundaries to help you switch off from work and do something else. Having an private office and defined office hours can help
6. Make sure that the people you live with understand when you are work and can’t be usually expected to join in other activities
7. Be flexible and break the schedule and work practices sometimes. After all flexibility is the main reason to telecommute

He also helps to create a decent working environment (space, light, furniture, storage, IT systems). I made some notes on this

What is Application Lifecycle Management?

The analysts and tools vendors have been talking about Application Lifecycle Management (ALM) for many years now and I think they have (of course) been somewhat self serving in their definitions. ALM seems to  include whatever product category they have in the current price list and then promising their integrations’ would be managements answer to cost and governance issues. I hope to say more about integrations in the future, but I’d like to look at the scope of ALM for now.

If you ask vendors and consultants (including me) about ALM scope you’ll get answers such:

• Requirements engineering
• Software Configuration management
• Dependency Tracking
• Change control and work tracking
• Test management
• Software development tools and process
• Software building and processes
• Deployment
• Process Governance

Depending on the vendor you might even get more traditional: Project and Program Management;  Project and Application Portfolio Management/Analysis; and Service Management activities thrown in as well.

The usual sales pitch is that everything is managed via a common tooling and provides a common repository. The major, and often single, selling point of this approach is improved governance and business oversight of the SDLC.

However I think it’s useful and important to look at the definition of ALM from a customers perspective rather than as analysts or vendors.

It seems that a more pragmatic approach is to describe ALM as the methods, processes and tools that support the management of change for software systems — with particular, but not exclusive, emphasise on the SDLC. In this context it does not matter if we are using Agile or Waterfall approaches, we chose the best tools and processes for our particular situation. This of course implies that in eighteen months time we may need to re-tool.

Furthermore the methods tools and processes of project management (PM) are much more mature and there is no real need to include them in this evolving segment — they have their own. Obviously PM will have an influence and impact on ALM and we need to design our ALM approach to dovetail with it. I realise that most vendors will not agree with this.

I have come to the conclusion in order to ‘sell’ ALM into the teams that will use it we need to ensure, front and centre, that ALM provides a ‘better/faster/more’ improvement in daily productivity. That should be the primary focus of what is delivered.

Governance, audit etc should be secondary attributes and natural site affects of using ALM (important though they are of course and usually the primary sales message).

So at a practical level we need to be able to provide teams and their specialists with the best tools they need to do their job. Additionally we need to provide a supporting layer of data flows, events and data repositories to

1. Assist teams with traceability
2. Provide the tracking and management visibility to effectively steer the ship

So the point of this post is to plead with vendors to stop selling a one size fits all tool suite with deep integrations and start enabling shallow API and effective integrations to allow a truly best of breed approach for customers software purchases. It’s a shame that ALF project is shuting down.

Yes! At last someone explains the difference between LinkedIn and Facebook

The Ultimate Social Media Etiquette Handbook: The Most Egregious Sins on Social Media Sites, Exposed » techipedia | tamar weinberg

Forgetting that some individuals won’t network with you on a “personal” space like Facebook without knowing who you are, even with the proper introduction. If you’re looking to establish a professional relationship with someone, consider LinkedIn. Otherwise, consider building up a rapport with an individual before randomly adding them as your friend. Some people require face-to-face meetings before they invite you into their private lives. After all, Facebook was a tool that college students were using before it was open to the public, and some still use it as a purely personal and not a professional tool. LinkedIn is still seen as the more professional of the two.

I am one of these strange people, so please don’t try and initiate a business relationship with me on facebook. However I’d be delighted to consider a professional connection on LinkedIn

What a young developer needs to know

(Updated 5/Oct/08 and 11/Nov/08)

I occasionally ponder on what skills and knowledge a novice who wants to become a skilled developer should acquire. In no particular order here is a suggested list of things to consider:

• Basic accounting: This is useful from both an IT perspective — a lot of IT systems are used for financial management; and from a general work perspective because it helps with your future in business
• Version control concepts and tools
• Waterfall Software Development Lifecycle (SDLC): Requirements, design, building, testing, release
• Agile SDLC such as XP and/or Scrum
• How to use a command line
• Basic compiler architecture — the 7 phases of compiling
• Data representation: Number bases (binary, Hex, BCD); character sets; XML markup
• Basic algorithms: Sorting, Linked lists etc, recursion,…
• Important design patterns
• Testing and quality as a substantial stand alone topic
• Programming in at least three languages: C (or Java, C++, Ada etc), Perl (or Python, Ruby etc) plus one other (e.g. Lisp, Haskell). At least one needs to be an OO language and OO programming should be a familiar habit. Perl does not count as OO for this discussion.
• How to use a word processor and spreadsheet
• Basic SQL, RDBMS architectures, 1st, 2nd & 3rd Normal forms and basic DB schema design
• TCP/IP networking and basics of http, email, ftp, etc. Needs to include conceptual understanding of DNS and related security issues
• Basic IT security concepts
• Basic IT System Management
• Personal task and work management (e.g. GTD or GSD, suggested by Sinewalker)
• Maintaining personal work records in a  log book

Further topics

• More advanced RDBMS use and schema design
• Embedded systems
• How to use LaTeX or Docbook
• Application engineering for quality (maintenance, extensibility, performance etc)
• OS design
• Requirements engineering
• UML

Further suggestions anyone?

Packing your laptop for travel and working on the road

Updated 6/Oct/09

When you travel any distance with a laptop it helps to have some good habits for packing, carrying and using your computer

What to pack:

1. If you travel abroad then a universal mains socket adaptor is required. I quite like this one, make sure it’s as robust as possible because sometimes they can be a little fragile.
2. USB Charging cables for phones, iPods etc. Saves taking the mains based charger and having to share the mains adaptor when abroad. Some laptop BIOS settings allow you to configure the USB ports to supply power even when the laptop is off or on battery, which is useful for overnight charging but you can flatten your laptop battery so be careful
3. Security cable for laptop. I prefer a combination lock to avoid having a key to lose. Get one with as long a cable as possible as anchor points sometimes need a stretch
4. If you use a mouse then get a smaller laptop model to pack — it could save you get getting RSI using the built in trackpad or trackpoint all the time. The really small laptop mice may be too small for prolonged use or larger hands so check before buying.
5. A small mouse matt. Hotel room desks etc. are often covered with glass (or worse dirt) and will not work with laser mice so get a small mouse mat. Pack it so it stays flat
6. I have always carried a spare LAN cable, however I am using it less and less as wireless becomes more common.  Depending on the places you go it can be useful, especially in hotel rooms, but beware buying retractable cables (sight unseen) as some are bulky.
7. Have small bags to place cables and mice in. It makes finding things a lot easier. Ziplocks plastic bags will do when you can’t get nylon or cloth
8. Headphones can be useful for music and VoIP calls (needs a mike as well). I don’t recommend USB headphones as they may be bulky and take up a sometimes precious USB connection. You need to experiment to see if a bluetooth headset works for you. If you can spring for headphones that work on the plane as well that’s a bonus but I have not bothered for a number of years as airlines now provide reasonable quality headsets (ignoring issues of noise cancelling headphones). It seems to be hard to protect expensive headsets without bulky cases so I get cheaper headsets and save the space.
9. Consider the use and packing of a 3G modem. In Australian hotels broadband access can be very expensive (A$20-30/night) and with the added convenience of 3G it can make a lot of sense. Shop around for the best deals. In the US free wireless access seems to be included as part of the hotel package — but check before leaving. And check how much 3G access costs when using global roaming, it can be VERY expensive.

Avoid wrapping the power leads tightly around your power brick — it stresses the cables and causes failures (I had a colleague who did it all the time)

Have a specified order and placement for all your items in your luggage. Do it enough and you won’t have to think about it and you’ll know were everything is.

Invest in a good quality laptop backpack. It will save your spine from being pulled to the side  and leave the hands free for other things. Business travelers can get smart, black, bags now. It should have a padded laptop compartment, or use a laptop sleeve. In addition make sure that the bag has enough additional packing for your other travel needs. e.g.

• Paper notebook/journal/Filofax
• Pens
• Paperwork (use file folders to protect loose paper sheets), magazines and books
• On longer trips passports, toiletries and spare plastic bags. I wrote some additional notes on trans-Pacific travel earlier
• Anything else that supports your travel flow and work flow.

N.B. When travelling, even with carry on luggage only, assume you will loose access to your suitcase for 24 hours and need to work/live as best you can from your backpack

Lastly make sure that you have the correct work processes and tools on hand to make the best use of your time away

Pre Sale demonstration techniques for Open Source Geeks

Open Source Industry Australia were kind enough to invite me to present last week on pre-sales demonstrations techniques. My main message was about delivering a Value based message — which is explained rather well by the following

Farting in Church « The Sales Wars

Here’s what decision makers care about:

* Improved Revenues
* Lowered Expenses
* Efficiency of Operations
* Managed Risk

As well as talking about a Value based approach I also added in some general tips. Enjoy, and of course feedback is always welcome.

Social networking services — one year on

Updated Nov/08 — added link to Twitter Tips and Silk Charm post

Some of the problems of Social Networking « Alec the Geek

issues with this type of online social networking

It’s actually more than a year since I first blogged about social networking and the world of web 2.0. The web, and the practices that surround it, have moved on so I thought I update my thoughts as well. By a strange coincidence, just as I was starting this post I came across crazeegeekchick‘s thoughts on how to use social networking — well worth reading before you carry on.

Generally social networking has been a huge consumer of my attention and time; and to be honest I don’t think the medium given me a very good return on my investment, except as a learning exercise.

1. LinkedIn has become an online list of business contacts. But of limited use because I can’t add my own notes to profiles. I have had some networking activity — but to be honest it has not made a huge amount of difference to my working life. I think now the number of people on the service is becoming so large anyway that it’s becoming less useful, but I hope I’m wrong
   Updated 13/Nov/08 — You can now add notes to your LinkedIn contacts
2. Facebook has become pretty pointless. I don’t have time to become a zombie and most of the other stuff I do use is not terribly useful. e.g. I just became a facebook fan of Gordon Ramsay — but so what? Nothing happens much.
3. Blogging gives me a certain amount of satisfaction and I often refer back to my old blog posts for information. I also know that a few people have found help from ramblings so I count the blog as a success. However it’s rare for me to get over 100 readers a day so it’s not a huge success
4. Lifestream (twitter, jaiku,identi.ca). This is very distracting and I need to find some way to stop keep looking at my friendfeed stream. However on the positive side it does provide me some of the support that I miss being a solo worker. It’s probably a good idea to whittle down my ‘posse’ to as few as 10 people to reduce the noise; question is which 10 — I’m generally pretty choosy who I “friend”. Problogger has a site introducing Twitter, and by extension most of the other micro blogging site, and Silkcharm also posted some suggestions
5. Geo Location (e.g. brightkite, dopplr). I am just so over that. In Australia it’s hard to use anyway because we have limited network coverage and I don’t have an iPhone. I keep thinking they a potentially huge personal security issue as well
6. I have accounts on delicious and flickr which I find useful. Delicious in particular has proved very useful professionally and personally.

As I mentioned earlier the major upside is that I now think know a lot more than the general population about this stuff — perhaps I can become a media pundit? Easier than doing real work, talking of which…

Top Tip: Long flights across the Pacific

Here in Australia it takes us over 14 hours to fly to America and there are a few little wrinkles and things you can do to help make the trip a bit easier. There are of course many, many, other sites on the intertubes with further suggestions:

• Invest in some decent carry on luggage so you don’t need to wait at the luggage carousel. It can be a long wait and if you do an internal flight as well that’s twice you need to wait for your luggage. I carry a laptop rucksack and a small suitcase — I can live for weeks from that. If you are travelling to West Coast US on business then you never need a suite or tie anyway.
• Copy the details of your passport, flight number (or use your boarding pass), return dates and hotel address into a sheet of paper so that you can fill in your US immigration and customs documentation. Also have a pen handy
• Ask the cabin crew if you can get your US forms as quickly as possible during the flight. It’s easier to fill when you are fresh and less tired. NB This usually doesn’t work — they have a process and you can’t upset it!
• Don’t eat too much before flying. It can make for an more uncomfortable flight and takes longer to recover from jet lag.
• Take a plastic carrier bag with you and put your shoes in it, then place in overhead luggage bin. They are out of the way for the rest of the flight, easy to find at the end and you don’t upset other passengers rubbing your dirty shoes on their luggage
• Collect as many of the travel amenity kits as possible whenever you travel and carry one or two in your hand luggage. This is useful for two reasons:
  • You can change out of your shoes and into flight socks before settling down
  • Far fewer flights now offer these kits anyway
• Try and sleep if possible. There are some tips here
• I always find it hard to work in economy so make sure you don’t have expectations of getting lots done
• Use a lip salve and skin moisturiser if needed

Updated 10/Oct/08

• Consider wearing trousers with large patch pockets on the legs so that bulky items (e.g. wallets and passports) are located at your knees and you don’t have to sit on them for 14 hours in your back pocket

See Also:

Airline Seating Tradeoffs

Optimise your aircraft seat

Get Through the Airport in Record Time with This Checklist, tips on getting through airport security faster.

emacs Tramp on Windows

Updated Oct/08

I am using emacs with the tramp extension to edit files on a remote server using ssh. I had to pull in various hacks to get it to work so I hope these notes might help others.

1. Install Emacs for Windows and Cygwin with OpenSSH
2. Upgrade emacs Tramp to the latest version. This is best done using Cygwin bash and Cygwin make (in particular ensure that –with-lispdir and –infodir options are set correctly when running configure).
   • Handy tip — leave the tramp build directory hanging around. When you next upgrade Emacs it’s just make install (providing you use same directory names)
3. Ensure that the Cygwin bin directory is on the Windows system path
4. At the Cygwin bash prompt test ssh connection to your host
5. Generate public/private keys and upload to the host
6. Test ssh again to see if public authentication works (it did not for me because it had been disabled by the UNIX admin)
7. Configure emacs to use tramp
(require 'tramp)
;;(setq tramp-debug-buffer t)
;;(setq tramp-verbose 10)
(setq tramp-auto-save-directory "c:\\tmp")
(setq tramp-default-method "plink")
8. Start emacs and test connection (C-x C-f) using cygwin ssh/scp/sftp. If it works skip to step 14. I had issues so I continued with step 9
9. Install the Putty program suite
10. Test the connection using putty
11. Ensure the Putty install directory is on the system PATH
12. In emacs visit the host (C-x C-f) using the method ‘plink’. If that does not work you are on your own (but see troubleshooting below)
13. If the public keys worked in ssh then import your OpenSSH keys into Putty
14. Use emacs bookmarks to save your common host locations

Troubleshooting:

1. Getting rid of the “Couldn’t find exit status of `test -e …” error message by deleting ~/emacs.d/tramp file. This clears cached settings as documented at http://www.nabble.com/Emacs-tramp-troubles-with-old-Sun-tt13607411.html.
2. If Tramp and Emacs does not work for you try these alternatives:
   1. Vim has a netrw plugin
   2. Both FileZilla and WinSCP have options to edit a file from the remote file system which then invokes a local Windows editor of your choice.
   3. jEdit has an ftp plugin that supports sftp and bookmarks

YMMV

With many thanks to all the folks on the web who documented their experiences and Michael Albinus on the tramp-devl mailing list.

Dimensions of Change

In the past when I’ve looked at Change Management issues I’ve tried to concentrate on lower level more practical topics. However recently I have the opportunity to think about change processes at the a higher level and of course that let me to want talk about it.

When looking at a change process it is tempting to see it as a single process, one size fits all, i.e all changes can be treated identically. However life is never that simple because changes have multiple facets. As well as identifying which change process needs to be followed, change dimensions provide information to assist us in prioritising work.

The most obvious difference, and the one that most people first come across, is the budget difference. Depending on who is paying for an change (IT or customers) has a direct bearing on the approval process. If the customer is paying (either directly or indirectly) then they, or their delegate such as the marketing department, must be involved in the financial approval to spend money. If it’s ‘free’ then the customer involvement may be limited to status updates.

A second dimension is size. The larger the size of the change the greater the process complexity and check points. How do we measure size? A variety of metrics need to be used, typically financial cost to implement, architectural impact on the software system, impact on other systems, how many project owners/stakeholders exist (this increases the issues involved in communication and resolving conflicting needs). This concept is reflected in the ITIL change process which recognises three levels of change impact and has different process flows accordingly.

A variation on the ‘financial cost to implement’ value is that different software systems may have different costs to deliver a similar level of business value. So a legacy application that contains a lot of cruft might cost $x to deliver y benefit, however in a different part of the business a different system might take a lot less than x dollars to deliver the same amount of value. So when comparing changes in a priority list, looking at a pure financial cost may not be enough.

The third Dimensions of change can be considered as political, i.e. who is sponsoring or controlling our changes? Often the executive team are able to generate a significant amount of strategic work which could absorb the all potential development and related resources. However an organisation also needs to exist on a daily tactical level and there are significant improvements to be made by implementing as many improvements to the current business as possible. However these changes often appear less significant to executive sponsors because of their more tactical nature despite their possibly huge business value.

When the various facets of a change are taken into account we can then make some decisions about the change e.g. Who will make the change, what level of process maturity will the change need to follow, which budget will pay for the change, who will be involved in acceptance testing, when will the change be released and so on.

Next time I will discuss some practical consequences of this and how to avoid some of the resulting pitfalls

Keeping a log book

Andrew discusses the use of a ‘laboratory’ style notebook for software development. His suggestions are excellent, but should really be taken further, especially for junior developers.

A developers log book should record a variety of information

Windows Explorer ‘Open Bash Here’

Updated May 2008

As mentioned by Andrew below this is all too hard now that we have the chere utility. At the cygwin shell prompt try the following

chere -i -c -n -t rxvt -s bash -o "-sl 2500 -fg lightblue -geometry 80x25 -bg midnightblue -sbt 10 -title bash" -e "Open Bash shell here"

If you want a shortcut to run bash for your home directory try

C:\bin\run.exe C:\bin\rxvt.exe -sl 2500 -fg lightblue -geometry 80x25 -bg midnightblue -sbt 10 -title bash -e /bin/xhere /bin/bash.exe %HOME%


——————————————————————————-
For users of Cygwin on Windows who like the Open Command Window Here power toy

I took this hack and this hack and combined them to make the following hack. It works on both directories and drives in Windows Explorer, and creates a visually attractive login shell (at least I think so).

Windows Registry Editor Version 5.00

[HKEY_CLASSES_ROOT\Directory\shell\bash]

@="Open Bash Shell Here"

[HKEY_CLASSES_ROOT\Directory\shell\bash\command]

@="c:\\\\bin\\\\bash.exe --login -i -c 'cd \"`cygpath \"$*\"`\";exec rxvt -sr -sl 2500 -fg lightblue --geometry 80x25 -bg midnightblue -sb -e bash' bash %L"

[HKEY_CLASSES_ROOT\Drive\shell\bash]

@="Open Bash Shell Here"

[HKEY_CLASSES_ROOT\Drive\shell\bash\command]

@="c:\\\\bin\\\\bash.exe --login -i -c 'cd \"`cygpath \"$*\"`\";exec rxvt -sr -sl 2500 -fg lightblue --geometry 80x25 -bg midnightblue -sb -e bash' bash %L"